ever since = from some point in time to the present OR to some other point in time in the past.
I don't like traveling ever since I came back from X.
OR
I haven't liked traveling ever since I came back from X.
- I didn't like traveling after I came back from X.
ever since can go with the present or present perfect as they are both tied to the present. It cannot go with the simple past.
OR I hadn't like traveling ever since I had come back from X.
In this example (not usual), it's ok since it refers to a point in time in the past.